Electricity storage device and vehicle

Abstract

The invention relates to a power storage device and a vehicle provided with the power storage device. This electricity storage device is provided with a first cell connection body and a second cell connection body which are electrically connected. The first cell connection body includes a plurality of first storage cells, and a first connection portion that electrically connects the first storage cells to each other. The second cell connection body includes a plurality of second storage cells, and a second connection portion that electrically connects the second storage cells to each other. At least one of the plurality of first storage cells is disposed so as to face any one of the plurality of second storage cells in the first direction. The power storage device is further provided with a holding member that holds the first power storage cell and the second power storage cell facing each other. At least a portion of the holding member is disposed between the first storage cell and the second storage cell facing each other.

Description

Technical Field

[0001] The present disclosure relates to a power storage device and a vehicle including the power storage device. Background Art

[0002] Japanese Patent Publication No. 2023-502457 discloses a rectangular parallelepiped battery (electricity storage device) having a length L of 400 mm to 2500 mm and a ratio (L / H) of length L to width H of 4 to 21.

[0003] In the power storage device described in Japanese Patent Application Publication No. 2023-502457, multiple electrode assembly groups connected in series and arranged in a row are disposed within a housing (casing). In this power storage device, the electrode assembly group corresponds to the power storage cell. Hereinafter, the connection of multiple power storage cells in a row is referred to as a "cell connection."

[0004] In order to increase the volumetric energy density of a storage device, it is effective to house not just one cell connector but multiple cell connectors in the housing. However, if the multiple cell connectors move excessively within the housing, the connections between these cell connectors and the connections between the storage cells are susceptible to damage. Therefore, it is possible to fix each cell connector to the inner surface of the housing using an adhesive with strong adhesion. However, in a storage device that uses such a fixing method, when the storage device is disassembled after use and the components are reused, the housing and each cell connector are not easy to separate. Therefore, for storage devices with multiple cell connectors, there is still room for improvement in terms of recyclability. Summary of the Invention

[0005] The present disclosure has been made to solve the above-mentioned problems, and an object of the present disclosure is to improve the recyclability of an electricity storage device including a plurality of cell connections.

[0006] According to an embodiment of the first aspect of the present disclosure, there is provided a power storage device described below.

[0007] (Item 1) The power storage device includes a first cell connector and a second cell connector that are electrically connected. The first cell connector includes a plurality of first power storage cells and a first connection portion that electrically connects the first power storage cells to each other. The second cell connector includes a plurality of second power storage cells and a second connection portion that electrically connects the second power storage cells to each other. At least one of the plurality of first power storage cells is arranged to be opposite to any one of the plurality of second power storage cells in a first direction. The power storage device further includes a retaining component that retains the opposing first power storage cell and second power storage cell. At least a portion of the retaining component is arranged between the opposing first power storage cell and second power storage cell.

[0008] According to the above structure, the first storage cell and the second storage cell are held by the retaining member and are not easily moved. Therefore, the adhesive for fixing the first cell connector and the second cell connector can be omitted, or the bonding strength of the adhesive used can be weakened. As a result, the recyclability of the storage device is improved. In addition, in each of the first cell connector and the second cell connector, each connection part can also be a conductive part. Each connection part can also connect the electrodes of adjacent storage cells. The first cell connector and the second cell connector can also be electrically connected by connecting the electrodes of the first cell connector to the electrodes of the second cell connector (for example, these electrodes are in contact, or these electrodes are connected via a conductive part). The positive electrode of the first cell connector can also be connected to the negative electrode of the second cell connector. The positive electrode of the first cell connector can also be connected to the positive electrode of the second cell connector. The first cell connector and the second cell connector can be connected in series or in parallel.

[0009] (Item 2) Based on the storage device described in Item 1, the retaining component has: a main body portion, located between the first storage cell and the second storage cell; a first cell retaining portion, extending from the main body portion toward the first storage cell side to retain the first storage cell; and a second cell retaining portion, extending from the main body portion toward the second storage cell side to retain the second storage cell.

[0010] According to the above-described holding member, it is easy to appropriately hold the first storage cell and the second storage cell.

[0011] (Item 3) The power storage device according to Item 2, wherein the main body is located between the first power storage cell and the second power storage cell in the first direction. The first power storage cell holding portion holds the first power storage cell. The second power storage cell holding portion holds the second power storage cell.

[0012] The holding member can reliably restrict movement of each of the first storage cell and the second storage cell by sandwiching the storage cells.

[0013] (Item 4) The power storage device according to any one of Items 1 to 3, wherein the plurality of first power storage cells in the first power cell assembly are arranged in a second direction perpendicular to the first direction. The plurality of second power storage cells in the second power cell assembly are arranged in the second direction. The retaining member has an X-shaped cross section perpendicular to the second direction.

[0014] According to the above-described holding member, even if the gap between the first and second storage cells is narrow, it is easy to appropriately hold the first storage cell and the second storage cell.

[0015] (Item 5) In the power storage device according to any one of Items 1 to 4, the retaining component includes a first resin component for retaining a first power storage cell, a second resin component for retaining a second power storage cell, and a metal plate located between the first resin component and the second resin component.

[0016] The retaining member can properly hold each storage cell using the resin component and improve thermal conductivity between each storage cell and its surroundings using the metal plate. For example, heat from each storage cell can be easily dissipated through the metal plate. Furthermore, when heating the storage cells, heat can be easily transferred to the storage cells through the metal plate.

[0017] (Item 6) The power storage device according to any one of Items 1 to 5 further includes a smoke detection circuit board. The holding member is provided with a flow path for guiding smoke exhausted from at least one of the opposing first and second power storage cells toward the circuit board.

[0018] According to the above configuration, it is easy to detect smoke exhaust from at least one of the first and second storage cells held by the holding member.

[0019] (Item 7) The power storage device according to any one of Items 1 to 6 further comprises: a circuit board for detecting smoke; and a spacer positioned between adjacent power storage cells in the first cell connector and / or between adjacent power storage cells in the second cell connector. The spacer is provided with a flow path for guiding smoke exhausted from at least one of the adjacent power storage cells toward the circuit board.

[0020] According to the above configuration, it is easy to detect smoke exhaust from at least one of two adjacent power storage cells with the separator interposed therebetween.

[0021] (Item 8) The power storage device according to any one of Items 1 to 7, wherein each of the plurality of first power storage cells is arranged to face any one of the plurality of second power storage cells in the first direction, and a retaining member is provided for each combination of the first and second power storage cells facing each other.

[0022] According to the above configuration, all of the first storage cells included in the first cell connection body can be held by the holding member.

[0023] According to an embodiment according to a second aspect of the present disclosure, a vehicle shown below is provided.

[0024] (Item 9) The vehicle includes the power storage device according to any one of Items 1 to 8.

[0025] In the above vehicle, the recyclability of the power storage device including the plurality of cell connections is improved.

[0026] The foregoing and other objects, features, aspects, and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A diagram for explaining the structure of a power storage device according to an embodiment of the present disclosure.

[0028] Figure 2 It is an enlarged representation Figure 1 A perspective view of the interior of the casing of the power storage device shown.

[0029] Figure 3 It is used for Figure 1 The diagrams illustrate the structure of each cell connection body shown.

[0030] Figure 4 yes Figure 1 An exploded perspective view of the storage cells included in each cell connection assembly shown.

[0031] Figure 5 yes Figure 1 Cross-sectional view at line VV in FIG.

[0032] Figure 6 yes Figure 1 Cross-sectional view at line VI-VI in FIG.

[0033] Figure 7 Yes Figure 1 FIG. 1 is a diagram of a first modified example of the power storage device shown.

[0034] Figure 8 yes Figure 7 Cross-sectional view at line VIII-VIII in FIG.

[0035] Figure 9 Yes Figure 5 FIG. 2 is a diagram showing a modified example of the structure of the holding member shown.

[0036] Figure 10 Yes Figure 9 FIG. 2 is a diagram showing a modified example of the holding member shown.

[0037] Figure 11 Yes Figure 1 FIG. 2 is a diagram of a second modified example of the power storage device shown.

[0038] Figure 12 yes Figure 11 Cross-sectional view at line XII-XII in FIG.

[0039] Figure 13 Yes Figure 1 FIG. 1 is a diagram showing a third modified example of the power storage device.

[0040] Figure 14 yes Figure 13 Cross-sectional view at line XIV-XIV in FIG.

[0041] Figure 15 Yes Figure 1 FIG. 4 is a diagram showing a fourth modified example of the power storage device.

[0042] Figure 16 yes Figure 15 Cross-sectional view at line XVI-XVI in FIG.

[0043] Figure 17 yes Figure 15 Cross-sectional view at line XVII-XVII in FIG.

[0044] Figure 18 It means in Figure 6 The diagram shows an example of a separator having flow paths formed therein.

[0045] Figure 19 It means in Figure 10 The diagram shows an example in which a flow path is formed in the holding member shown.

[0046] Figure 20 It means combining multiple Figure 1 A diagram of an example of a power storage module manufactured using the battery shown.

[0047] Figure 21 It means it is equipped with Figure 20 FIG. 1 is a diagram showing an example of a vehicle including a power storage module. DETAILED DESCRIPTION

[0048] The embodiments of the present disclosure are described in detail with reference to the accompanying drawings. In the accompanying drawings, the same or corresponding parts are marked with the same figure marks, and the description is not repeated. In the drawings used below, among the mutually orthogonal X-axis, Y-axis and Z-axis, the X-axis represents the first in-plane direction of the battery (for example, the length direction), the Y-axis represents the second in-plane direction of the battery (for example, the width direction), and the Z-axis represents the height direction of the battery. Hereinafter, the directions indicated by the arrows of the X-axis, Y-axis and Z-axis are marked with "+", and the opposite directions are marked with "-".

[0049] Figure 1 It is a diagram for explaining the structure of the power storage device according to this embodiment. Figure 1 The "External Structure Diagram - Z1" in the figure is a diagram of the contents of the enclosure viewed from the +Z side. Figure 1 The "Internal Structure Diagram of the Housing - Z2" is a diagram of the contents of the housing viewed from the -Z side.

[0050] The power storage device according to this embodiment is Figure 1 The battery 100 shown. The battery 100 is, for example, a secondary battery such as a lithium-ion battery, a nickel-metal hydride battery, or a sodium-ion battery. As examples of lithium-ion batteries, there can be cited an LFP battery using lithium iron phosphate as a positive electrode active material, or a ternary battery using NMC (nickel, manganese, cobalt) as a positive electrode active material. The type of secondary battery can be a liquid secondary battery or an all-solid-state secondary battery. The battery 100 has a plurality of storage cells that each function as a secondary battery, and the details will be described later. The battery 100 may include only storage cells of the same type (for example, only LFP batteries), or may include storage cells of different types (for example, LFP batteries and ternary batteries).

[0051] The battery 100 includes a rectangular parallelepiped outer shell 300. The length of the outer shell 300 (the dimension in the X direction) is longer than the width of the outer shell 300 (the dimension in the Y direction). The length of the outer shell 300 may be greater than 250 mm and less than 5000 mm, for example, about 1000 mm. The width of the outer shell 300 may be greater than 10 mm and less than 1250 mm, for example, about 50 mm. The ratio of the length of the outer shell 300 to the width of the outer shell 300 may be greater than 4 and less than 25. The height of the outer shell 300 (the dimension in the Z direction) may be greater than 10 mm and less than 1250 mm, for example, about 100 mm. However, the size of the outer shell 300 is not limited to the above.

[0052] The housing 300 includes a main body 310 and a cover 320. The main body 310 is, for example, a cylindrical shell with a bottom having an opening on the end face on the +X side, which accommodates the cell connectors 10 and 20. The cover 320 is a plate-shaped component (cover component) having an outer shape corresponding to the opening of the main body 310, which blocks the opening on the +X side of the main body 310. The main body 310 and the cover 320 can be formed of the same material or different materials. As the materials constituting the main body 310 and the cover 320, for example, metal can be used. The housing 300 can also be an aluminum housing. However, these materials can be changed appropriately. For example, the cover 320 can also be formed of an insulating material.

[0053] The cell connector 10 includes four storage cells 11 to 14 and three connection portions 2A that electrically connect the storage cells to each other. The storage cells 11 to 14 are connected in a row along the X direction in the housing 300. The cell connector 20 includes four storage cells 21 to 24 and three connection portions 2B that electrically connect the storage cells to each other. The storage cells 21 to 24 are connected in a row along the X direction in the housing 300. In this way, the cell connector 10 and the cell connector 20 are arranged parallel to the X direction. Each storage cell is configured to be able to store electricity. In this embodiment, the cell connector 10, the cell connector 20, the Y direction, and the X direction respectively correspond to an example of the "first cell connector", the "second cell connector", the "first direction", and the "second direction" involved in the present disclosure. The storage cells 11 to 14 , 21 to 24 , connection portion 2A, and connection portion 2B respectively correspond to examples of the “first storage cell,” “second storage cell,” “first connection portion,” and “second connection portion” in the present disclosure.

[0054] In the housing 300 of the battery 100, the cell connector 10 is electrically connected to the cell connector 20. Specifically, Figure 1 As shown, the end of the -X side of the cell connector 10 (storage cell 14) and the end of the -X side of the cell connector 20 (storage cell 24) are electrically connected in the housing 300, for example, via a U-shaped connection portion 2C. The connection portion 2C has a U-shaped cross-section, whereas the connection portions 2A and 2B each have an I-shaped cross-section. The connection portion 2C basically has the same structure as the connection portion 2A or 2B except that it is formed into a different shape. The connection portion 2C may be an integrally molded part or a composite of a plurality of separately molded parts. For example, the protrusion 144B ( Figure 3 ) and the protrusion 144B ( Figure 3 ) are connected via a conductive material (beam portion) to form a connection portion 2C. In addition, the protrusion 144B will be described later.

[0055] The cell connectors 10 and 20 are arranged so that the storage cells and their connection portions are aligned. The storage cells 11, 12, 13, and 14 included in the cell connector 10 overlap with the storage cells 21, 22, 23, and 24 included in the cell connector 20 in the Y direction, respectively. In other words, all the storage cells included in the cell connector 10 are arranged so as to face any storage cell included in the cell connector 20 in the Y direction.

[0056] The housing 300 also accommodates retaining components 51 to 54. The retaining component 51 is arranged between the opposing storage cells 11 and 21 to retain the storage cells 11 and 21. The retaining component 52 is arranged between the opposing storage cells 12 and 22 to retain the storage cells 12 and 22. The retaining component 53 is arranged between the opposing storage cells 13 and 23 to retain the storage cells 13 and 23. The retaining component 54 is arranged between the opposing storage cells 14 and 24 to retain the storage cells 14 and 24. In this way, in the battery 100, retaining components are provided for each combination of storage cells opposing in the Y direction. With such a structure, all the storage cells accommodated in the housing 300 can be retained by the retaining components. The details of the retaining components 51 to 54 will be described later (see Figure 5 ).

[0057] The housing 300 also accommodates a plurality of spacers 60 (for example, three spacers 60). The plurality of spacers 60 overlap with the connecting portions 2A and 2B in the Y direction, respectively. Specifically, the plurality of spacers 60 are located between the connecting portions 2A and 2B in the Y direction, respectively. In the cell connector 10, adjacent storage cells are opposed to each other in the X direction via the spacers 60. In addition, in the cell connector 20, adjacent storage cells are also opposed to each other in the X direction via the spacers 60. The spacer 60 is a spacer shared by the cell connectors 10 and 20, and is located between adjacent storage cells in the cell connector 10 and between adjacent storage cells in the cell connector 20. Details of the spacer 60 will be described later (refer to Figure 6 ).

[0058] The +X side end portion (storage cell 11) of the cell connection body 10 is connected to the cover 320 via the connection terminal T1. The +X side end portion (storage cell 21) of the cell connection body 20 is connected to the cover 320 via the connection terminal T2. Figure 2 It is an enlarged perspective view showing the ends of the cell connection bodies 10 and 20 on the +X side in a state where the holding members 51 to 54 and the spacer 60 are removed.

[0059] The cover 320 has a sealing hole 321, an external terminal 322, and a connector 323. The sealing hole 321 can also be a pressure adjustment hole for adjusting the pressure inside the housing 300. The sealing hole 321 has a sealing structure formed by a metal cover (outside the housing) and a sealing member (inside the housing). Such a sealing structure ensures the airtightness inside the housing 300. The external terminal 322 includes a connection terminal T1 ( Figure 1 ) joined (eg, laser welded) to the electrode tab 322A and the connection terminal T2 ( Figure 1) is joined (for example, by laser welding) to the electrode tab 322B. The electrode tabs 322A and 322B are electrically connected to the storage cells 11 and 21, respectively. The electrode tabs 322A and 322B each have an insulating sealing structure formed of ceramics around the electrode, for example. In this embodiment, the electrode tabs 322A and 322B function as a negative electrode tab and a positive electrode tab, respectively. However, this is not limiting, and the polarity may be reversed, with the electrode tab 322B being the negative electrode tab and the electrode tab 322A being the positive electrode tab. The connector 323 includes, for example: an output terminal that outputs a detection signal indicating the state inside the housing 300 (for example, the temperature of each storage cell) detected by one or more sensors inside the housing 300 to the outside of the housing; and an input terminal that inputs a control signal from the outside of the housing to one or more devices inside the housing 300. For example, a temperature sensor may be provided inside the housing 300 for each storage cell.

[0060] The cell connectors 10 and 20 are inserted into the main body 310 with the retaining members 51 to 54 and the spacer 60 installed. By retaining the storage cells by the retaining members 51 to 54, the cell connectors 10 and 20 can be easily inserted into the main body 310. The retaining members 51 to 54 and the spacer 60 can be installed before or after welding the connecting portions 2A and 2B (for example, welding the protrusions 144A and 144B described later). After the cell connectors 10 and 20 are inserted into the main body 310 together with the retaining members 51 to 54 and the spacer 60, the main body 310 and the cover 320 are joined. For example, the main body 310 and the cover 320 are welded by laser.

[0061] Furthermore, at least one of a pressure regulating hole and a gas discharge valve may be provided on the -X end surface of the main body 310. Furthermore, an opening may be formed on the -X end surface of the main body 310, similar to the +X end surface of the main body 310. Furthermore, a cover formed separately from the cylindrical main body 310 may be joined to the opening (e.g., by laser welding).

[0062] In this embodiment, the cell connection body 10 and the cell connection body 20 have basically the same structure. Therefore, hereinafter, when the storage cells 11 to 14 and 21 to 24 are not distinguished, they are referred to as "storage cell 1", and when the connection portion 2A and 2B are not distinguished, they are referred to as "connection portion 2".

[0063] Figure 3 1 and 2 are diagrams for explaining the respective structures of the cell connectors 10 and 20. Figure 3As shown, each cell connection body has four storage cells 1. Moreover, a connection portion 2 is provided between adjacent storage cells 1, and the connection portion 2 electrically connects these storage cells 1. Each cell connection body is constructed so that the storage cells 1 and the connection portions 2 are alternately arranged. In each of the cell connections 10 and 20, the storage cells 1 are connected to each other via the connection portion 2. The rigidity of the connection portion 2 is lower than the rigidity of the storage cells 1. The storage cells 11 to 14 and 21 to 24 are composed of the same storage cells 1. By using a common storage cell 1 to form the cell connections 10 and 20, the manufacture of the battery 100 becomes easy, and the manufacturing cost can be reduced.

[0064] However, the structure of the cell connectors 10 and 20 is not limited to the above-described structure. Each cell connector may include storage cells of different sizes and shapes. Furthermore, the number of storage cells housed in the housing 300 is not limited to eight and can be varied as appropriate. The number of storage cells included in each cell connector may be less than four, ranging from five to 19, or even greater than 20.

[0065] In this embodiment, the storage cell 1 is a laminated cell having one or more winding bodies. In the laminated cell, one or more winding bodies functioning as electrode bodies are covered with a laminated outer body. Figure 2 In the figure, the storage cell is shown with the laminated outer casing omitted. The wound body, for example, has a structure in which a positive electrode sheet and a negative electrode sheet are wound with a separator interposed therebetween. The positive electrode sheet and the negative electrode sheet each include an electrode foil and an active material layer.

[0066] Figure 4 This is an exploded perspective view of the storage cell 1. Figure 3 The cross-sectional view in (XY cross-sectional view around the connection part 2) and Figure 4 , the structures of the storage cell 1 and the connecting portion 2 will be described.

[0067] like Figure 4 As shown, the storage cell 1 includes two wound bodies 110A and 110B, separators 120A and 120B, terminal members 130A and 130B, and covers 150A and 150B.

[0068] The wound bodies 110A and 110B each have coated portions 111A and 111B, electrode tabs 112A and 112B, and electrode tabs 113A and 113B. Coated portions 111A and 111B are regions of the electrode foil where an active material layer is applied to the positive or negative electrode sheet. Electrode tabs 112A, 112B, 113A, and 113B are regions of the positive or negative electrode sheet where the electrode foil is exposed (uncoated regions where an active material layer is not applied). Electrode tabs 112A and 112B are located at the +X-side ends of the wound bodies 110A and 110B, respectively. Electrode tabs 113A and 113B are located at the -X-side ends of the wound bodies 110A and 110B, respectively.

[0069] The electrode tabs 112A and 112B are arranged so as to overlap in the Y direction, and a separator 120A and a terminal member 130A are provided between the electrode tabs 112A and 112B (see FIG. Figure 3 The electrode tabs 113A and 113B are arranged to overlap in the Y direction, and a separator 120B and a terminal member 130B are provided between the electrode tabs 113A and 113B (see Figure 3 ).

[0070] The spacers 120A and 120B are made of insulating material (such as synthetic resin) and have insulating properties. The spacers 120A and 120B have a shape in which the size in the Y direction increases as the distance from the coating portion 111A and 111B increases (see Figure 3 Terminal member 130A is connected to the end face on the +X side of insulator 120A. Terminal member 130B is connected to the end face on the -X side of insulator 120B. Terminal members 130A and 130B each contain a conductive material (e.g., a metal such as aluminum or copper) and have conductivity. The wound body 110A and the wound body 110B are joined to each other (e.g., by laser welding) via terminal members 130A and 130B.

[0071] Current collector terminals 140A and 140B each constitute a portion of connector 2. They include support portions 142A and 142B, and protrusions 144A and 144B, respectively. One of current collector terminals 140A and 140B functions as a positive electrode current collector terminal, while the other functions as a negative electrode current collector terminal. In one example, the positive electrode current collector terminal is made of aluminum, and the negative electrode current collector terminal is made of copper.

[0072] The collector terminals 140A and 140B are formed into an L shape, respectively. The support portions 142A and 142B are formed into a plate shape in the YZ plane, respectively, and the protrusions 144A and 144B are formed into a plate shape in the XZ plane, respectively. The support portion 142A and the protrusion 144A can be formed and joined separately, or they can be formed in an integrated state by bending. The support portion 142B and the protrusion 144B can also be formed and joined separately, or they can be formed in an integrated state by bending. The support portion 142A is joined to the end face of the +X side of the terminal component 130A (for example, laser welding) (refer to Figure 3 ). The support portion 142B is joined to the end surface of the terminal member 130B on the -X side (eg, laser welding) (see Figure 3 ).

[0073] The cover 150A covers the +X side end portion of the storage cell 1 (including the electrode tabs 112A and 112B). However, the cover 150A is provided with a through hole h1 for the protrusion 144A. The protrusion 144A protrudes toward the +X side of the storage cell 1 through the through hole h1 (see FIG. Figure 3 ). In addition, the cover 150B covers the end portion of the storage cell 1 on the -X side (including the electrode tabs 113A and 113B). However, the cover 150B is provided with a through hole h2 for the protrusion 144B. The protrusion 144B protrudes toward the -X side of the storage cell 1 through the through hole h2 (see Figure 3 ).

[0074] like Figure 3 As shown, at the connection portion 2, the protrusion 144A of one storage cell 1 is joined to the protrusion 144B of the other storage cell 1 in two adjacent storage cells 1 (for example, laser welding). The welded portion may also be protected with a tape or the like. Figure 4 As shown, however, the surfaces of the two winding bodies 110A and 110B are provided Figure 3 The laminated outer casing 160 is shown. The laminated outer casing 160 is, for example, a laminate film, and is provided on the surface of the storage cell 1 .

[0075] The above structure is merely an example of the structure of the storage cell 1 and can be modified as appropriate. For example, the number of wound bodies included in the storage cell 1 is not limited to two and can be one or three or more. Furthermore, a laminated body (e.g., a laminated body composed of a positive electrode sheet and a negative electrode sheet stacked with a separator interposed therebetween) can be used as the electrode body instead of a wound body.

[0076] Figure 5 yes Figure 1 The cross-sectional view at line VV in FIG. Figure 5As shown, an insulating layer 310a containing a resin such as PET (polyethylene terephthalate) is provided on the inner surface of the main body 310 of the casing 300. As a result, the casing 300 is electrically insulated from the components inside the casing 300. However, in a casing (shell) that ensures sufficient insulation, the insulating layer 310a can be omitted. For example, the cell connectors 10, 20, the retaining parts 51 to 54, and the separator 60 may also be covered with an insulating film (insulating layer). By integrating these components with an insulating film, the insertability into the casing 300 is improved. In the following, the end face on the +Z side of each storage cell is sometimes referred to as the "upper surface", and the end face on the -Z side of each storage cell is sometimes referred to as the "lower surface".

[0077] like Figure 5 As shown, the retaining member 53 has an X-shaped cross-section (YZ cross-section) perpendicular to the X direction. With this shape, the retaining member 53 can respectively hold the storage cells 13 and 23 facing each other in the Y direction. The retaining member 53 retains both the upper and lower surfaces of the storage cell 13 (first storage cell) and the upper and lower surfaces of the storage cell 23 (second storage cell).

[0078] Specifically, the retaining member 53 includes a first retaining portion 531, a second retaining portion 532, and a main body 533. The main body 533 is located between the first retaining portion 531 and the second retaining portion 532 in the Z direction and functions as a connector connecting these retaining portions. Furthermore, the main body 533 is located between the storage cells 13 and 23 in the Y direction and functions as a spacer to maintain a constant distance between these storage cells. An X-direction groove P1 is formed on the -Z end face of the first retaining portion 531 and the +Z end face of the second retaining portion 532. Groove P1 also serves to release pressure.

[0079] The surface on the +Z side of the first retaining portion 531 functions as a retaining surface and contacts the lower surfaces of the respective storage cells 13 and 23. The surface on the -Z side of the second retaining portion 532 functions as a retaining surface and contacts the upper surfaces of the respective storage cells 13 and 23. The portions of the first retaining portion 531 and the second retaining portion 532 that are closer to the +Y side than the main body 533 correspond to the first cell retaining portion extending from the main body 533 toward the storage cell 13 side, and retain (more specifically, clamp in the Z direction) the storage cell 13. In addition, the portions of the first retaining portion 531 and the second retaining portion 532 that are closer to the -Y side than the main body 533 correspond to the second cell retaining portion extending from the main body 533 toward the storage cell 23 side, and retain (more specifically, clamp in the Z direction) the storage cell 23.

[0080] The holding component 53 includes an insulating material (e.g., resin) and has insulating properties. The holding component 53 is, for example, an integrally molded part. The first holding portion 531, the second holding portion 532, and the main body portion 533 are seamlessly integrated. However, the present invention is not limited to such a structure, and the various parts constituting the holding component 53 may also be molded and joined separately. In this embodiment, the first holding portion 531, the second holding portion 532, and the main body portion 533 are respectively resin parts. However, the present invention is not limited to such a method, and these parts may also be formed of different materials.

[0081] exist Figure 5 , only the structure of the holding member 53 is representatively shown, but the other holding members (holding members 51 , 52 , 54 ) also have the same structure as the holding member 53 .

[0082] Figure 6 yes Figure 1 Cross-sectional view at line VI-VI in FIG. Figure 6 The separator 60 shown has, for example, a rectangular parallelepiped shape and is positioned between adjacent storage cells 12 and 13 in the cell connector 10. The separator 60 is made of an insulating material (e.g., resin) and has insulating properties. The -Z-side surface of the separator 60 contacts the inner surface (insulating layer 310a) of the main body 310 of the housing 300. The Z-direction dimensions of the separator 60 are set corresponding to the dimensions of each storage cell. The +Z-side surface of the separator 60 is substantially coplanar with the upper surfaces of each storage cell 12 and 13. Thus, a region R1 is formed between the +Z-side surfaces of the storage cells 12 and 13 and the separator 60, and the inner surface (top surface) of the main body 310. Region R1 may also contain at least one of a thermal management system (e.g., a heater and / or temperature sensor), a gas exhaust system (e.g., a gas flow path and / or pressure sensor), an FPC (flexible printed circuit board), and wiring connected to the connector 323. The device and / or sensor provided in the region R1 may also be connected to the connector 323 of the cover 320 .

[0083] The X-direction dimension of the spacer 60 is set corresponding to the distance between two adjacent storage cells. The spacer 60 functions to maintain a constant distance between the storage cells 12 and 13. Specifically, the spacer 60 restricts movement of the storage cell 12 toward the -X side and movement of the storage cell 13 toward the +X side, thereby preventing the storage cells 12 and 13 from coming too close together.

[0084] exist Figure 6 In the figure, only the separator 60 between the storage cells 12 and 13 is shown as a representative example, but Figure 1 The other spacers 60 shown also have Figure 6The shape of the spacer 60 can be changed as appropriate. For example, the spacer 60 can be formed in a cylindrical shape or a prism shape other than a cube (hexagonal prism shape, octagonal prism shape, etc.).

[0085] The retaining members 51 to 54 and the spacer 60 can also be fixed to the housing 300 using an adhesive or double-sided tape. However, without using this fixing method, the recyclability of the storage device can be further improved. The battery 100 (storage device) involved in this embodiment includes retaining members between the first and second storage cells facing each other to retain these first and second storage cells. The retaining members 51 to 54 each function as such a retaining member. According to the battery 100 having such a structure, the first and second storage cells are held by the retaining members and are less likely to move. Therefore, the adhesive used to secure the first and second cell connectors can be omitted, or the adhesive strength of the adhesive used can be reduced. As a result, the recyclability of the storage device is improved. Even if the cell connectors 10 and 20 move within the housing 300 while being retained by the retaining members 51 to 54, the positional relationship between the storage cells does not change, and thus the connecting portions 2A to 2C are less likely to be damaged.

[0086] It is not necessary to provide retaining members for all combinations of storage cells that face each other in the Y direction. For example, retaining members 52 and 53 among the retaining members 51 to 54 may be omitted, with retaining members 51 and 54 retaining only the ends of the cell assemblies 10 and 20 in the X direction. Alternatively, retaining members 51 and 54 among the retaining members 51 to 54 may be omitted, with retaining members 52 and 53 retaining only the center of the cell assemblies 10 and 20 in the X direction.

[0087] Figure 7 Yes Figure 1 FIG. 1 is a diagram of a first modified example of a battery shown. Figure 8 yes Figure 7 Cross-sectional view at line VIII-VIII in FIG.

[0088] like Figure 7 As shown, the battery 100A according to the first modification example basically has the same Figure 1 However, in the battery 100A, the retaining member 51 ( Figure 1 ) Instead of the holding member 52 ( Figure 1 ) Instead of the holding member 53 ( Figure 1 ) Instead of the holding member 54 ( Figure 1) Instead, resin parts 54A, 54B and metal plate 70 are used.

[0089] like Figure 8 As shown, the resin component 53A has a C-shaped cross-section as a cross-section orthogonal to the X direction (YZ cross-section). With such a shape, the resin component 53A can clamp the battery cell 13. In detail, the resin component 53A has a first holding portion 531A, a second holding portion 532A and a main body 533A. The portions (corners) where the first holding portion 531A and the second holding portion 532A are connected to the main body 533A, respectively, may be chamfered. The main body 533A is located between the first holding portion 531A and the second holding portion 532A in the Z direction, and functions as a connecting portion that connects these holding portions. In addition, the main body 533A is located between the battery cell 13 and the battery cell 23 in the Y direction. The first holding portion 531A and the second holding portion 532A correspond to first cell holding portions extending from the main body 533A toward the storage cell 13, and hold (more specifically, sandwich) the storage cell 13. The resin member 53A holds both the upper and lower surfaces of the storage cell 13 (first storage cell).

[0090] The resin component 53B has a C-shaped cross-section in the opposite direction to the resin component 53A as a cross-section orthogonal to the X direction (YZ cross-section). With such a shape, the resin component 53B can clamp the storage cell 23. In detail, the resin component 53B has a first retaining portion 531B, a second retaining portion 532B and a main body 533B. The portions (corners) where the first retaining portion 531B and the second retaining portion 532B are respectively connected to the main body 533B may also be chamfered. The main body 533B is located between the first retaining portion 531B and the second retaining portion 532B in the Z direction, and functions as a connecting portion that connects these retaining portions. In addition, the main body 533B is located between the storage cell 13 and the storage cell 23 in the Y direction. The first holding portion 531B and the second holding portion 532B correspond to second cell holding portions extending from the main body 533B toward the storage cell 23, and hold (more specifically, sandwich) the storage cell 23. The resin member 53B holds both the upper and lower surfaces of the storage cell 23 (second storage cell).

[0091] Resin components 53A and 53B are each formed of resin. Metal plate 70 is positioned between resin components 53A and 53B in the Y direction. Furthermore, both ends of metal plate 70 in the Z direction contact the inner surface of main body 310 of housing 300. Metal plate 70 is, for example, an aluminum plate. However, this is not limiting and metal plate 70 may be formed of a metal other than aluminum. For example, metal plate 70 may be a copper plate or a stainless steel plate.

[0092] The metal plate 70 is joined to the resin parts 53A and 53B (e.g., welded), and these resin parts 53A, 53B and the metal plate 70 function as a holding member for holding the storage cells 13 and 23 facing each other in the Y direction. Such a holding member can appropriately hold each storage cell with the resin parts 53A and 53B, and can improve the heat conductivity between each storage cell and its surroundings through the metal plate 70. For example, it is easy to transfer heat from each storage cell to the outside of the housing 300 (e.g., the heat exchanger described later) through the metal plate 70. Figure 20 In addition, when the temperature is released from the outside of the housing 300 (for example, the temperature regulating device 800 described later), Figure 20 When heating the storage cells using the temperature control device 800 shown in FIG. 1 , heat is easily transferred to the storage cells via the metal plate 70. The contact between the metal plate 70 and the outer casing 300 improves thermal conductivity between the storage cells and the outer casing 300. However, to ensure sufficient thermal conductivity without such a structure, at least one end of the metal plate 70 in the Z direction may not be in contact with the outer casing 300.

[0093] exist Figure 8 In the figure, only the retaining member (resin members 53A, 53B and metal plate 70) located between the storage cells 13 and 23 is representatively shown, but the retaining member (resin members 51A, 51B and metal plate 70) located between the storage cells 11 and 21, the retaining member (resin members 52A, 52B and metal plate 70) located between the storage cells 12 and 22, and the retaining member (resin members 54A, 54B and metal plate 70) located between the storage cells 14 and 24 also have Figure 8 The structure shown.

[0094] Figure 9 Yes Figure 5 FIG. 2 is a diagram showing a modified example of the structure of the holding member shown. Figure 9 The holding member 50 shown in FIG. 5 has a first holding portion 501, a second holding portion 502, and a main body portion 503. The first holding portion 501, the second holding portion 502, and the main body portion 503 each have substantially the same Figure 5 The first holding portion 531, the second holding portion 532, and the main body portion 533 shown in the figure have the same structure. However, claw portions P2 are provided at both ends of each of the first holding portion 501 and the second holding portion 502 in the Y direction.

[0095] The first and second retaining portions 501 and 502, each located closer to the +Y side than the main body 503 (the first cell retaining portion), retain the storage cell 1 (the first storage cell) via the retaining surfaces and the claws P2. These first cell retaining portions clamp the first storage cell in the Z direction using the retaining surfaces, while the claws P2 prevent the first storage cell from moving outward (to the +Y side). The claws P2 of the first cell retaining portion engage the first storage cell, securing it in a predetermined position.

[0096] The portions of the first retaining portion 501 and the second retaining portion 502 located closer to the -Y side than the main body 503 (the second cell retaining portion) each retain the storage cell 1 (the second storage cell) using the retaining surfaces and the claws P2. These second cell retaining portions clamp the second storage cell in the Z direction using the retaining surfaces, while the claws P2 prevent the second storage cell from moving outward (to the -Y side). The claws P2 of the second cell retaining portion engage the second storage cell, securing it in a predetermined position.

[0097] For example, the battery 100 may be replaced with the holding member 50 having the above-mentioned structure instead of at least one of the holding members 51 to 54. Figure 9 The first holding portion 501 and the second holding portion 502 shown in FIG. 5 are not formed with grooves ( Figure 5 However, the present invention is not limited thereto, and the groove P1 may be formed in each of the first holding portion 501 and the second holding portion 502.

[0098] Figure 10 Yes Figure 9 FIG. 2 is a diagram showing a modified example of the holding member shown. Figure 10 The retaining member 50A shown has Figure 9 The illustrated retaining member 50 has the second retaining portion 502 removed. The retaining member 50A has a T-shaped cross-section perpendicular to the X-direction (YZ cross-section). In the retaining member 50A, the portion of the first retaining portion 501 located on the +Y side relative to the main body 503 (the first cell retaining portion) retains the storage cell 1 (the first storage cell) via the retaining surface and the claw portion P2. Furthermore, the portion of the first retaining portion 501 located on the -Y side relative to the main body 503 (the second cell retaining portion) retains the storage cell 1 (the second storage cell) via the retaining surface and the claw portion P2. A space (region R2) is formed between the inner surface (top surface) of the main body 310 of the housing 300 and the +Z side surfaces of two adjacent storage cells 1 and the main body 503 located therebetween. Region R2 may also contain at least one of a thermal management system, a gas exhaust system, an FPC, and wiring connected to the connector 323.

[0099] For example, in the battery 100 , the holding member 50A having the above-described structure may be used instead of at least one of the holding members 51 to 54 .

[0100] exist Figure 1 The illustrated battery 100 employs a common spacer 60 for both the first and second cell connectors. However, the present invention is not limited to this, and separate spacers may be provided between adjacent storage cells in each of the first and second cell connectors. Furthermore, the spacer 60 may be replaced with a retaining member.

[0101] Figure 11 Yes Figure 1 FIG. 2 is a diagram of a second modified example of a battery shown in FIG. Figure 12 yes Figure 11 Cross-sectional view at line XII-XII in FIG.

[0102] like Figure 11 and Figure 12 As shown, the battery 100B according to the second modification has substantially the same Figure 1 However, in the battery 100B, instead of the three separators 60 ( Figure 1 ), and instead adopt three holding components 60B. In addition, Figure 11 The cross section at line VV in Figure 5 The cross sections shown are identical.

[0103] like Figure 11 As shown in FIG. 1 , the holding member 60B is formed into an H-shape in a plane (XY plane) perpendicular to the Z direction. Figure 12 As shown, the retaining member 60B has an X-shaped cross-section perpendicular to the Y direction (XZ cross-section). With this shape, the retaining member 60B can respectively hold the storage cells 12 and 13 facing each other in the X direction. The retaining member 60B retains both the upper and lower surfaces of the storage cell 12 and the upper and lower surfaces of the storage cell 13.

[0104] Specifically, the retaining member 60B includes a first retaining portion 601, a second retaining portion 602, and a main body 603. The main body 603 is located between the first retaining portion 601 and the second retaining portion 602 in the Z direction and functions as a connector connecting these retaining portions. Furthermore, the main body 603 is located between the storage cells 12 and 13 in the X direction and functions as a spacer to maintain a constant distance between these storage cells. Furthermore, a Y-direction groove may be formed on at least one of the -Z-side end surface of the first retaining portion 601 and the +Z-side end surface of the second retaining portion 602.

[0105] The surface on the +Z side of the first retaining portion 601 functions as a retaining surface and contacts the respective lower surfaces of the storage cells 12 and 13. The surface on the -Z side of the second retaining portion 602 functions as a retaining surface and contacts the respective upper surfaces of the storage cells 12 and 13. The portions of the first retaining portion 601 and the second retaining portion 602 that are closer to the +X side than the main body 603 extend from the main body 603 toward the storage cell 12 side to retain (more specifically, clamp) the storage cell 12. In addition, the portions of the first retaining portion 601 and the second retaining portion 602 that are closer to the -X side than the main body 603 extend from the main body 603 toward the storage cell 13 side to retain (more specifically, clamp) the storage cell 13.

[0106] The holding component 60B includes an insulating material (e.g., resin) and has insulating properties. The holding component 60B is, for example, an integrally molded part. The first holding portion 601, the second holding portion 602, and the main body 603 are seamlessly integrated. However, the present invention is not limited to such a structure, and the various parts constituting the holding component 60B may also be molded and joined separately. The first holding portion 601, the second holding portion 602, and the main body 603 may each be, for example, a resin part. However, the present invention is not limited to this, and these various parts may also be formed of different materials.

[0107] exist Figure 12 In the figure, only the holding member 60B located between the storage cells 12 and 13 is shown as a representative example, but Figure 11 The other retaining member 60B shown also has Figure 12 According to the holding member 60B described above, the movement of the cell connection bodies 10 and 20 can be easily suppressed.

[0108] Figure 13 Yes Figure 1 FIG. 3 is a diagram of a third modified example of a battery shown. Figure 14 yes Figure 13 Cross-sectional view at line XIV-XIV in FIG.

[0109] like Figure 13 and Figure 14 As shown, the battery 100C according to the third modification has substantially the same Figure 11 However, in the battery 100C, the holding member 60B ( Figure 11 and Figure 12 ) instead uses the retaining member 60C. In addition, Figure 13 The cross section at line VV in Figure 5 The cross sections shown are identical.

[0110] like Figure 13As shown, in battery 100C, a single retaining component 500A is formed by retaining components 51-54 and retaining components 60C arranged between adjacent retaining components to connect these retaining components 51-54. Retaining component 500A includes retaining components 51-54 and retaining components 60C formed to physically connect the retaining components. Retaining components 51-54 are connected in a row along the X direction within housing 300. Retaining components 60C are provided at three locations. Retaining component 60C located between retaining components 51 and 52 in the X direction functions as a connecting portion connecting retaining components 51 and 52. Retaining component 60C located between retaining components 52 and 53 in the X direction functions as a connecting portion connecting retaining components 52 and 53. Retaining component 60C located between retaining components 53 and 54 in the X direction functions as a connecting portion connecting retaining components 53 and 54.

[0111] like Figure 14 As shown, the retaining member 60C has substantially the same Figure 12 The holding member 60C has the same structure as the holding member 60B shown in FIG. The holding member 60C has a first holding portion 601A, a second holding portion 602A and a main body portion 603A. The first holding portion 601A, the second holding portion 602A and the main body portion 603A have substantially the same Figure 12 The first holding portion 601, second holding portion 602, and main body portion 603 shown in the figure have the same structure. However, the first holding portion 601A is connected to the adjacent holding members 52 and 53 on its +X side and -X side, respectively. In addition, the second holding portion 602A is also connected to the adjacent holding members 52 and 53 on its +X side and -X side, respectively.

[0112] exist Figure 14 In the figure, only the holding member 60C located between the storage cells 12 and 13 is shown as a representative example, but Figure 13 The other retaining member 60C shown also has Figure 14 According to the above-mentioned holding member 500A, it is easy to suppress the movement of the cell connection bodies 10 and 20. The holding member 500A may be an integrally molded part or a composite body formed by joining a plurality of separately molded parts.

[0113] Figure 15 Yes Figure 1 FIG. 4 is a diagram showing a fourth variation of the battery. Figure 16 yes Figure 15 Cross-sectional view at line XVI-XVI in FIG. Figure 17 yes Figure 15 Cross-sectional view at line XVII-XVII in FIG.

[0114] like Figures 15 to 17As shown, the battery 100D according to the fourth modification example basically has the same Figure 13 However, in the battery 100D, the holding member 500A ( Figure 13 ) Instead, retaining component 500B is used.

[0115] The holding member 500B includes holding members 51D, 52D, 53D, and 54D, and holding members 60D provided between adjacent holding members to connect these holding members 51D to 54D. In the holding member 500B, the -Z-side ends of the holding members 51D to 54D are connected in the X direction via the holding members 60D. The holding members 60D are provided at three locations.

[0116] like Figure 16 As shown, the retaining member 53D has Figure 5 The holding member 53 shown in FIG. 5 is a structure in which the second holding portion 532 is removed. The holding member 53D includes a first holding portion 531D and a main body 533D. The first holding portion 531D and the main body 533D have the same Figure 5 The first holding portion 531 and the main body 533 shown in FIG. have the same structure. Figure 16 In the figure, only the holding member 53D is shown as a representative example, but the holding members 51D, 52D, and 54D also have Figure 16 The structure shown.

[0117] like Figure 17 As shown, the retaining member 60D has Figure 14 The holding member 60C shown in FIG. 1 is a structure in which the second holding portion 602A is removed. The holding member 60D includes a first holding portion 601D and a main body portion 603D. The first holding portion 601D and the main body portion 603D have the same Figure 14 The first holding portion 601A and the main body portion 603A shown in FIG. Figure 17 In the figure, only the retaining member 60D located between the storage cells 12 and 13 is shown as a representative example, but Figure 15 The other retaining member 60D shown also has Figure 17 The structure shown.

[0118] In the battery 100D, as Figure 16 and Figure 17As shown, a space (region R3) is formed between the inner surface (top surface) of the main body 310 of the housing 300 and the +Z side surfaces of the plurality of storage cells and the plurality of retaining members. At least one of a thermal management system, a gas exhaust system, an FPC, and wiring connected to the connector 323 may also be provided in region R3. The retaining member 500B described above facilitates securing space within the housing 300. The retaining member 500B may be a one-piece molded part or a composite body formed by joining together a plurality of separately molded parts.

[0119] A flow path through which smoke exhausted from the power storage cells flows may be formed in the above-mentioned spacer 60 , holding member 60B, holding member 60C, or holding member 60D. Figure 18 It means in Figure 6 The separator 60 shown is an example of a flow path. Figure 18 In the example shown, Figure 6 An FPC (flexible printed circuit) 700 is provided in the illustrated region R1 , and a flow path GL1 is formed in the spacer 60 . Figure 18 The separator 60E shown is the separator 60 that forms the flow path GL1. Figure 1 The separator 60 shown is the same and is located between adjacent storage cells in the cell connector 10 (first cell connector) and between adjacent storage cells in the cell connector 20 (second cell connector). FPC700 is configured to detect smoke. For example, FPC700 can also be configured to be disconnected during smoke exhaust. Insulator 60E is provided with a flow path GL1 that guides smoke exhausted from adjacent storage cells 12 and 13 to FPC700. If FPC700 detects smoke exhaust from at least one of the adjacent storage cells 12 and 13, it can also output a signal indicating this to connector 323.

[0120] exist Figure 1 In the illustrated battery 100 , the flow path GL1 may be formed in all three separators 60 , or may be formed in only one or two separators 60 . Figure 18 The illustrated flow path GL1 may be modified so as to guide smoke from only one of the adjacent power storage cells 12 and 13 toward the FPC 700 .

[0121] A flow path through which smoke exhausted from the storage cells flows may be formed in the holding members 51 to 54 , the holding member 50 , the holding member 50A, the resin members 51A to 54A, the resin members 51B to 54B, or the holding members 51D to 54D. Figure 19 It means in Figure 10 The holding member 50A shown in FIG. Figure 19 In the example shown, Figure 10 The FPC 700 is provided in the illustrated region R2 , and a flow path GL2 is formed in the holding member 50A. Figure 19 The holding member 50E shown is the holding member 50A in which the flow path GL2 is formed. Figure 1 At least one of the holding components 51 to 54 shown is adopted to hold the first storage cell and the second storage cell between the first storage cell and the second storage cell opposite to each other in the Y direction. FPC700 is configured to detect smoke. In the holding component 50E, there is provided a flow path GL2 for guiding the smoke respectively discharged from the two storage cells 1 (the first storage cell and the second storage cell) opposite to each other in the Y direction to the FPC700. If the FPC700 detects smoke exhaust from at least one of the two opposite storage cells 1, it can also output a signal indicating this situation to the connector 323. In addition, Figure 19 The illustrated flow path GL2 may be modified so as to guide smoke from only one of the two power storage cells 1 facing each other in the Y direction toward the FPC 700 .

[0122] The above-described batteries 100, 100A to 100D and their variations can also function independently as power storage devices, but a plurality of such batteries can also be combined to form a modular structure.

[0123] Figure 20 : is a diagram showing an example of a power storage module including a plurality of batteries. Figure 20 The vertical, front-back, and left-right directions are shown as being orthogonal to each other. "Down" corresponds to the vertical direction (the direction of gravity), and "up" is the opposite direction. The diagram showing the battery module from above shows the internal structure of battery module 200.

[0124] Figure 20 The battery module 200 shown includes a plurality of batteries 100. In the battery module 200, the plurality of batteries 100 are arranged so that the +Z side of each battery faces upward and the −Z side of each battery faces downward (see Figure 1 ). However, for each of the plurality of batteries 100, Figure 1 and Figure 2 The direction of the cover 320 (the surface on the +X side) shown can be arbitrarily set. For example, in the storage module 200, all batteries 100 can be oriented in the same direction. Alternatively, the storage module 200 can include both batteries 100 with the cover 320 facing right and batteries 100 with the cover 320 facing left. Multiple batteries 100 can be electrically connected in series or in parallel. The storage module 200 functions as a storage device.

[0125] exist Figure 20In the example shown, a temperature control device 800 is provided on the upper surface of the storage module 200. The temperature control device 800 is configured to control the temperature of each of the plurality of batteries 100 included in the storage module 200. The temperature control device 800 may also include at least one of a heater and a cooler. The temperature control device 800 is controlled by a control device 900. The control device 900 includes, for example, a processor and a storage device, and communicates with the respective connectors 323 ( Figure 1 ) connection. The control device 900 receives a signal (for example, a sensor detection value) from the connector 323 of each battery and sends a control instruction to the temperature control device 800. The control device 900 can also control the temperature control device 800 based on the status of each battery. In addition, in the storage module 200, other batteries (any one of the batteries 100A to 100D, or batteries with various modifications of these structures as described above) can be used instead of the battery 100. In addition, the temperature control device 800 can also be provided on the lower surface of the storage module 200.

[0126] The batteries 100, 100A-100D, their variations, and the power storage module 200 described above can be mounted on, for example, a mobile object. Examples of mobile objects include automobiles (electric vehicles, hybrid vehicles, etc.), vehicles other than automobiles (ships, airplanes, etc.), mobile machinery (agricultural machinery, construction machinery, etc.), and unmanned mobile objects (automatic guided vehicles, robots, etc.). However, the power storage device can be used for any purpose and can also be stationary.

[0127] Figure 21 It means it is equipped with Figure 20 FIG. 1 is a diagram showing an example of a vehicle including a power storage module. Figure 21 The vehicle 2000 shown in the figure includes a battery pack 1000. The battery pack 1000 includes a plurality of power storage modules 200 and functions as a power storage device. The battery pack 1000 may also include Figure 20 The temperature control device 800 shown. The battery pack 1000 may be installed on or under the floor of the vehicle 2000. The vehicle 2000 is, for example, an electric vehicle configured to travel using the power output from the battery pack 1000. The battery pack 1000 may also supply power to a driving motor mounted on the vehicle 2000. In the battery pack 1000, the storage modules 200 are electrically connected to each other, for example, via a bus bar. The battery pack 1000 may also include more than 100 storage cells.

[0128] The various features related to the above-mentioned power storage device (the features described in the embodiment and the modified examples) can also be implemented in any combination. The power storage device can also be applied to devices other than vehicles.

[0129] While the embodiments of the present invention have been described, the embodiments disclosed herein are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is indicated by the claims, and is intended to include all modifications within the scope of the claims and equivalents thereof.

Claims

1. A power storage device, wherein: The power storage device includes a first cell connection body and a second cell connection body that are electrically connected. The first cell connection body includes a plurality of first storage cells and a first connection portion for electrically connecting the first storage cells to each other. The second cell connection body includes a plurality of second storage cells and a second connection portion for electrically connecting the second storage cells to each other. At least one of the plurality of first storage cells is arranged to face any one of the plurality of second storage cells in a first direction. The power storage device further includes a holding member for holding the first power storage cell and the second power storage cell facing each other. At least a portion of the holding member is disposed between the opposing first and second storage cells.

2. The power storage device according to claim 1, wherein The holding component has: a main body located between the first storage cell and the second storage cell; a first cell holding portion extending from the main body toward the first storage cell and holding the first storage cell; and The second cell holding portion extends from the main body portion toward the second storage cell and holds the second storage cell.

3. The power storage device according to claim 2, wherein The main body is located between the first storage cell and the second storage cell in the first direction. The first cell holding portion holds the first storage cell. The second cell holding portion holds the second storage cell.

4. The power storage device according to claim 1, wherein The plurality of first storage cells in the first cell connection body are arranged in a second direction perpendicular to the first direction. The plurality of second storage cells in the second cell connection body are arranged in the second direction. The holding member has an X-shaped cross section as a cross section perpendicular to the second direction.

5. The power storage device according to claim 1, wherein The holding member includes a first resin member that holds the first storage cell, a second resin member that holds the second storage cell, and a metal plate located between the first resin member and the second resin member.

6. The power storage device according to claim 1, wherein The power storage device also has a smoke detection circuit board. The holding member is provided with a flow path for guiding smoke exhausted from at least one of the opposed first and second storage cells toward the circuit board.

7. The power storage device according to claim 1, wherein The power storage device further comprises: Circuit board for detecting smoke; and a separator located between adjacent storage cells in the first cell connector and / or between adjacent storage cells in the second cell connector; The separator is provided with a flow path for guiding smoke exhausted from at least one of the adjacent storage cells toward the circuit board.

8. The power storage device according to claim 1, wherein The plurality of first storage cells are respectively arranged to face any one of the plurality of second storage cells in the first direction. The holding member is provided for each combination of the opposing first and second storage cells.

9. A vehicle, wherein: A power storage device according to any one of claims 1 to 8 is provided.

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